<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="AddRoleDialogVisible=true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row v-for="(item1, id1) in scope.row.children"
            :class="['bdbottom', id1 === 0 ? 'bdtop' : '','vcenter']"
            :key="item1.id">
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{item1.authName}}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级权限 -->
              <el-col :span="19">
                <el-row v-for="(item2, id2) in item1.children" :key="item2.id"
                :class="[id2 !== 0 ? 'bdtop' : '','vcenter']">
                  <!-- 二级权限列表 -->
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">
                      {{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限列表 -->
                  <el-col :span="18">
                    <el-tag v-for="(item3) in item2.children"
                    type="warning" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
                    {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="400px">
          <template slot-scope="scope">
            <el-button type="primary" size="mini" icon="el-icon-edit"  @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" size="mini" icon="el-icon-delete"  @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning" size="mini" icon="el-icon-setting" @click="showSetRightsDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog title="添加角色" :visible.sync="AddRoleDialogVisible" width="40%" @close="addRoleDialogClosed">
      <el-form
        :model="addRoleForm"
        ref="addRoleFormRef"
        :rules="addRoleFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="AddRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色对话框 -->
    <el-dialog title="编辑角色" :visible.sync="editRoleDialogVisible" width="40%" @close="addRoleDialogClosed">
      <el-form
        :model="editRoleForm"
        ref="editRoleFormRef"
        :rules="editRoleFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoles">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="30%" @close="setRightDialogClose">
      <el-tree :data="rightsList" :props="treeProps" show-checkbox
      node-key="id" :default-checked-keys="defaultKeys" default-expand-all
      ref="treeRef">
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  created () {
    this.getRolesList()
  },
  data () {
    return {
      // 角色列表数据
      roleList: [],
      // 添加用户对话框
      AddRoleDialogVisible: false,
      // 添加角色表单
      addRoleForm: {},
      // 添加角色表单验证
      addRoleFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 编辑角色信息
      editRoleForm: {},
      editRoleDialogVisible: false,
      editRoleFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 分配权限对话框的展示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件的属相绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 当前即将分配权限的Id
      roleId: 0,
      // 默认选中的权限
      defaultKeys: []
    }
  },
  methods: {
    async getRolesList () {
      const {data: res} = await this.$http.get('/roles')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.roleList = res.data
    },
    // 添加角色对话框的关闭
    addRoleDialogClosed () {
      this.$refs.addRoleFormRef.resetFields()
    },
    // 添加角色
    addRoles () {
      this.$refs.addRoleFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败！')
        }
        this.$message.success('添加角色成功！')
        this.AddRoleDialogVisible = false
        this.getRolesList()
      })
    },
    // 打开编辑角色对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询角色信息失败！')
      this.editRoleForm = res.data
      this.editRoleDialogVisible = true
    },
    // 编辑角色
    editRoles () {
      this.$refs.editRoleFormRef.validate(async valid => {
        // 表单预校验失败
        if (!valid) return
        const { data: res } = await this.$http.put(
          'roles/' + this.editRoleForm.roleId,
          {
            roleName: this.editRoleForm.roleName,
            roleDesc: this.editRoleForm.roleDesc
          }
        )
        if (res.meta.status !== 200) {
          this.$message.error(res.meta.msg)
        }
        // 隐藏编辑角色对话框
        this.editRoleDialogVisible = false
        this.$message.success('更新角色信息成功！')
        this.getRolesList()
      })
    },
    // 删除角色
    async removeRoleById (id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败！')
      this.$message.success('删除用户成功！')
      this.getRolesList()
    },
    // 根据id删除对应权限
    async removeRightById (role, rightsId) {
      const confirmRes = await this.$confirm(
        '确认删除该权限？', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmRes !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const {data: res} = await this.$http.delete(`/roles/${role.id}/rights/${rightsId}`)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightsDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const {data: res} = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.rightsList = res.data
      // 递归获取三级节点id
      this.getLeafkeys(role, this.defaultKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归 获取角色下三级权限的 id, 并保存到defKeys数组
    getLeafkeys (node, arr) {
      // 没有children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      // 递归
      node.children.forEach(item => this.getLeafkeys(item, arr))
    },
    // 监听分配权限对话框的关闭，清空选中的权限
    setRightDialogClose () {
      this.defaultKeys = []
    },
    // 点击位角色分配权限
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.getRolesList()
      this.setRightDialogVisible = false
    }

  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
